package io;

import java.io.*;

public class CopyDemo3Buffered {
    public static void main(String[] args) throws IOException {
        //缓冲流 加快读写效率：
        //BufferedInputStream;

        FileInputStream fis = new FileInputStream("风景2.png");
        BufferedInputStream bis= new BufferedInputStream(fis);

        FileOutputStream fos = new FileOutputStream("风景0.png");
        BufferedOutputStream bos = new BufferedOutputStream(fos);
        long start = System.currentTimeMillis();
        int b;
        while ((b=bis.read())!=-1){
            bos.write(b);
        }
        long end = System.currentTimeMillis();
        System.out.println("复制完毕，耗时："+(end-start)+"ms");

bis.close();
bos.close();
    }
}
